

//size
#define SREENSIZE [UIScreen mainScreen].bounds.size

//宽度
#define SREENWIDTH [UIScreen mainScreen].bounds.size.width

//高度
#define SREENHEIGHT [UIScreen mainScreen].bounds.size.height

//指顶RGB
#define RGB(x,y,z)  [UIColor colorWithRed:(x/255.0) green:(y/255.0) blue:(z/255.0) alpha:1]

//随机颜色
#define randomRGB RGB(arc4random_uniform(255.0), arc4random_uniform(255.0), arc4random_uniform(255.0))
